AT
Meng seems to be working on a different level than the users here. He is talking about having a statement and plan ready about the "new" DAW in 4-6 weeks. A plan. Not the thing itself. It seems some here think a new rewrite, with notation and every bug fix, along with a "P5" emulation, is coming out in a few weeks.
You're right about the announcement being the only thing that Meng actually mentioned a timeline for (coming within a month/month-and-a-half), but there is the matter of the new iteration coming "much sooner than expected".
Now, this is just me making a stab at what could reasonably be "expected", but given the circumstances I wouldn't normally expect a new post-acquisition product iteration sooner than maybe the beginning of next year.
If it's to be "much sooner", then I'm thinking more of a summer release - perhaps around June. All of this is conjecture, of course, but given that the product was in active development previously that should give a reasonable run up to integrate any outstanding features or fixes from the previous team, plus do a rebrand and perhaps a spot of integration with BandLab's existing toolset.
We should also bear in mind that if the thing weren't coming within the next several months, there would likely be no announcement whatsoever - other than perhaps a generic statement along the lines of "we'll be done with finalizing the transfer of the acquired properties within the next 4-6 weeks; we'll outline a roadmap for the future then".